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Nucleation and growth of small CdS aggregates by chemical reaction

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
156
Identifiers
DOI: 10.1016/0039-6028(85)90279-1

Abstract

Abstract The nucleation and growth of CdS has been studied experimentally by allowing H 2S to react with a solution of cadmium salt. The precipitation was followed by simultaneously measuring H 2S pressure, conductivity and optical density of the solution, cadmium ion activity, and pH. Variables were [Cd 2+], rate of admission of H 2S, complexing ions present, and solvent. These variables determined particle size and structure (cubic or hexagonal). The complexes present appear to play a key rôle in determining whether Ostwald ripening takes place, and in the formation of secondary clumps of crystals called boules.

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